Liam tweeted Niall after the single dropped, saying: “Good luck boss give him all your support huge day for him proud of you boss.”

This isn’t the first instance of the boys not keeping in touch. Zayn Malik admitted that the boys weren’t in contact any more after he dramatically left the band last year.

Speaking to The Sun in January he said: “I had every intention of remaining friends with everybody, but I guess phone numbers have changed and I haven’t received calls from a lot of people.

“I’ve reached out to a few of them and not got a reply. Certain people have pride issues, but it’s stuff you overcome in time.”

One Direction star Niall Horan drops video for new single This Town

During his interview on Radio One, Niall also revealed that he plans to release an album next year, and then go on tour.

He added: "It won't be this year, it's not finished yet. I still have some writing to do so we'll see what happens."

The single came as a surprise to One D fans as Niall had kept the song a big secret, telling Greg James that even some people at his record label didn't know he had even signed for them until two weeks ago.

As well as writing songs, the singer has been playing some golf in his down time

The Irish star has pulled off a sensational coup by recruiting super-producer Greg Kurstin to mastermind the track.

They pair had worked together on some One D hits, like Story of My Life.

Greg, 47, has six Grammy nominations to his name and also produced Lily Allen’s The Fear, Ellie Goulding’s Burn and Sia’s Chandelier.

Horan has also managed to become the first member of the band to launch his solo career, ahead of fellow One D stars Harry Styles and Liam Payne, who are both in the process of plotting their own solo careers.